Movement of substances across the cell membrane

Difusoin

movement of molecules from a region of higher concentration to a region of lower concentration

concentration gradient

Osmosis

diffusion of water to a permeable membrane

response to the concentration gradient

Facilitade diffusion

diffusion throught a membrane

protein acting as carrier molecules

Filtration

movement of fluid through a membrane

response to hydrostatic pressure

active transport

movement of substances against a concentration gradient

lower concentration to higher concentration

requires a carrier molecule and uses energy

Endosytosis

formation of vesicles in cell membrane

transfer particles and droplets from o the outside into the cell membrane

Phagocytosis is

ingestion of solids

Pinocytosis

ingestion of liquids

Exocytosis

discharge of the cell

particles too large to pass throught cell membrane by diffusion

Isotonic solution

solution has same concentration osmotic pressure as fluid within the cell

Hypertonic solution

solution has higher concentration that the fluids within a cell

Hypotonic solution

has a lower concentration that the fluids within a cell